A Wind Shield for the PASCO Coulomb Apparatus

摘要

The PASCO Coulomb's law apparatus has a very sensitive torsion balance on which a sphere capable of holding a static charge is suspended. Rapid motion in the vicinity of the balance, breathing directly on the sphere, or air currents from ventilation will all move the sphere around significantly. This motion makes it very difficult to obtain meaningful data. In fact, the sphere moves so much under the influence of the ventilation in our alb that it was not possible to obtain repetitive results.